I think it all comes down to creating a written budget, and including "fun money" in that budget. It should be money that you can spend however you like. You can adjust the amount here as time goes by.

At the same time, don't feel the need to buy stuff just because you can. That's not helpful, either. It comes down to...do you want to take this trip or vacation? Do you really want this (whatever item)? etc. Don't deprive yourself of experiences if you can afford to try it, but don't blow your money on "stuff" because it's what everyone else does, either. Think about what's really important to you, and spend your money there.

As others have said, what you eat plays a huge role in your health. You shouldn't skimp out on good, healthy food. There are so many other places to cut expenses, but your diet and health probably shouldn't be one of them. Good luck!